Girder construction for excavators



Feb. 2 1926.

G. T. RONK GIRDER CONSTRUCTION FOR EXCAVATORS Filed March 24 1924 2'sheets-sheet 1 'ley Feb. 2 1926. A 1,571,377

G. T. RoNK GIRDER CONSTRUCTION FOR EXCAVATORS Filed March 24, 1924 2shutpsheet 2 Patented Feb. 2, 1926.

UNITED STATES PATENT oFFicE.

GEORGE T. RONK, OF DES MOENES, OWA, ASSGNOR T0 MACHINERY COR- PORATIGN,OF FAIRFIELD, IOWA.

GIRDER CONSTRUCTION FOR EXCAVATORS.

Application led March 24, 1924. Serial No. 701,518.

To all w/Lof/'IL t may concern.'

Be it known that l, Grenen T. RoNii, a citizen of the United States, anda resident of Des Moines, in the county of Polk, State of Iowa, haveinvented a certain new and useful Girder Construction for Excavators, ofwhich the following is a specification.

This invention relates to improvements in frame constructions forexcavators of that type illustrated in my co-peuding` application :tiledJanuary 11, 1922, Serial Number 528.587, on an excavating machine.

The object of my invention is to provide anew and improved frameconstruction for that type of excavators which employ a truck and anexcavator carrying frame pivoted to swing in a horizontal plane abovethe truck, said pivoted frame being designed to carry a boom and drumsfor actuating the boom, and a shovel.

. More .specifically it is the object of my invention to construct theboom and drum supporting frame of stock material such as I-beams andplates, the same being riveted and secured together in such a manner asto form a frame of light weight and inea: pensive construction whichwill support the necessary operating mechanism, and at the same time bevery rigid.

My invention consists in the construction, arrangement and combinationof the various parts of the device, whereby the objects contemplated areattained, as hereinafter more fully set forth, pointed out in my claims,and illustrated in the accompanying` drawings, in which:

Figure 1 is a side elevation of an excavator truck of the type to whichmy improvement is related, showing mounted thereon my improved excavatorsupporting frame, and also illustrating part of the mechanism which isdesigned to be carried by the said frame.

Figure 2 is a central longitudinal sectional view of a portion of theframe.

Figure 3 is a transverse sectional view taken on the line 3 3 of Figure2.

The num-eral 10 indicates a truck frame provided with supporting andsteering wheels 11 and tractor wheels 12. The tractor wheels 12 areprovided with sprocket wheels 13 designed to carry chains 14 driven bymean-s of sprocket pinions 15. The pinions 15 are mounted on acountershaft 16 rotatively mounted in bearings 17 from the under side ofthe frame 10.

The frame 10.comprises a series of longitudinally extending I-beams ofwhich there are preferably flour in number. The I- beams 18 are designedto support a pivot post 19. A circular internal gear 2O is supported ontop of the frame 1() concentric with the support 19 having an outwardlyextending flange 21.

My improved frame comprises a pairV of Lbeams 22 of considerable lengthand spaced apart and parallel with each other. The under faces of theI-beams 22 are provided with a plate 23, and the upper faces providedwith a plate 24. On top of the plate 24 and vertically above each of themembers 22 I have provided an I-beam 25, the said I-beam being shorterthan the Lbeams 22. The bottom flanges of the I-beam 25, the plate 24and the top flanges of the I-beams 22 are secured together by suitablerivets 26, while the plate 23 is secured to the bottom flanges of theI-beams 22 by rivets 27.

The upper flanges of the beams 25 are designed to carry a. series ofjournals 28, 29 and 30. The journals 29 are designed to receive a shaft31, the central portion of which is provided with a beveled gear 32. Theshaft 31 is provided with a belt wheel The beveled gear 32 is designedto mesh with a beveled gear 34 mounted on the upper end of a verticallyarrange-d shaft 35 pivotally mountedin the plates VJ3 and 24. A gear 36is splined with the said shaft and is designed to be moved into and outof engagement with a second gear 37 mounted on-a vertically arrangedshaft 38, which is also pivotally mounted in the plates 23 and 24. Thesaid shaft 3S is also rotatively mounted in the pivot support 19 and hasits lower end provided with a beveled gear 39, which in turn meshes withthe beveled gear 40 on the shaft 16.

A third vertically arranged shaft 41 is also pivotally mounted in theplates 23 and 24 and is designed to carry al gear 42 which may also beengaged by the gear 36. The `lower end of the shaft 41 is provided witha pinion 43 designed to mesh with the teeth of the gear 20. The beams 22and the plate 23 are designed to carry roller supporting brackets 44having rollers 45 designed to travel on the flange 21 of the gear 20.Each of the shafts 23 and 30 is provided with spur gears 45 and 46designed to mesh with a spur gear 47 on the shaft 29. The shafts Q8 and30 are also designed te carry cable drums 48. -A boom Lt9 is secured toone end ot the members 22, while an engine is supported on the oppositeend, the belt Wheel 33 being driven by means ot the belt 51 trom thesaid engine. t

The above gearing devices have been described and illustrated simply forthe purpose o't' more clearly illustrating the purpose to which my frameconstruction is adapted. lt will be seen that when the variousmcclmnisms have been operated and the shat't 29 is rotated, the verticalshaft 35 willalso be rotated, and that the truck may be advancediorwardly by simply shitting theK gear S6 into'engagen'ient with thegear 37', orit it is desired to rotate .the frame 22 above the. trame10, the gear 36 is moved into engagement with the gear l2 or the gear 36may be moved to throw bo-th o't said mechanisms out. of operation.Either ot the drums 48' may be actuated independently by mechanism notillustrated.

It will be seen that when the various mechanisms mentioned have been setinto operation, a considerable amount ot strain is thrown onto thetrainemembers in various directions andat various angles.

ltwilhalso be seen that by the construction herewith illustrated, arigid frame has becnprovided ot cheap and light construction, which willcarry the various-mechanisinsk without breaking or twisting.

I claim as my invention:

1L An excavator frame comprising spaced and ].iarallel'I-beams havingthe webs of said: I-beanis arranged vertically, a plate riveted to thelower flanges oit said I-beams, aseCCndplate on-top otsaid I-beams, anLbeam on top ofsaid plate and above each ot the .tiret said I-beanis andin a common plane therewith. the lowerflanges of the topi-beams and theupper flanges of the lower Lbeams being rigidly secured together andtosaid second plate.

2. An excavator trame comprising` spaced and parallel I-beams having thewebs of said beams arranged vertically, a plate riveted to the lowerflanges ot said I-beams, a second plate on top of said I-beams, a pairof I-bcams on top of the last said plate parallel with the first saidI-bea-ms, the flanges oi the top Ibeams and the upper flanges oit thelower I-beams being rigidly secured to said plate, a series ot journalsfor the upper flanges ot said upper I-beams, and a series ot' shaftsextending vertically through the said plates.

An excavator trame comprising a pair of spaced and parallel I-beains,having their webs in vertical planes, a plate secured to the nuclei.'side of said I-beams, a plate secured on top of said I-beams and abovethe iirst said plate, an I-'beain on said top plate above each ot thctirst said I-beams and parallel therewith, means for supporting a seriesot horizontally arranged shafts on the rtop plate ot said top I-beams,and means tor supporting a series o vertically arranged shafts in saidplates, one end of said ,trame being designed to carry a boom and theopposite end an engine.

l. A truck, an 'excavator' fra-me comprising a pair ot' spaced andparallel I-beams, having their webs in vertical planes, a plate securedto the under side o'l' said Lbeams, a plate secured on top ot saidI-beams and above the vtirst said plate, an I-beam on said top plateabove each of the first said -beams and parallel therewith, means 'forsupporting a series ot` horizontally arranged sha'lts on the top plateot said top iI-beams, means for supporting a series ot' verticallyarranged shai'ts in said plates, one end of said frame being designed tocarry a boom and the opposite end an engine, and means i'or revolublysupporting said excavator trame above said truck.

GEORGE T. RONK,

